Coraline growth stopped

[JR8999]

A couple of months ago it looked like my 6 month old tank was well on its way to purple land. 2 months later it looks to me like the coraline that had started is mostly gone. Haven't changed lighting intervals or anything else for that matter. Any ideas??
Thanks

 

[m0nkie]

alkalinity level and dosing??? when my coralline started growing, it consumed my alk rapidly.. they grow at higher alk.

 

[kurt_n]

Agree... check calcium and alkalinity.

When I started, and had very little in the way of coral, I wasn't testing for calcium. My coraline algae was growing like crazy though, and then suddenly stopped and started turning white. Found my calcium levels at 340. Once I got them back up over 400, and started dosing cal/alk (just for my coraline!) it came back again.

 

[JammyBirch]

How do you increase Alkalinity? What do you dose? It's carbonate right?

 

[acabgd]

How do you increase Alkalinity? What do you dose? It's carbonate right?

You first need to test it before dosing.

 

[pyithar]

you could use sodium carbonate (washing soda/soda ash/baked baking soda) to raise alkalinity and pH. sodium bicarbonate (baking soda) will also raise alkalinity but it will lower pH a bit.

 

[tommyboynj]

Do you have an urchin by any chance?